Jarring device for dust-collectors.



Patented. Apr. 13, 11.915.

H. LECHTENBERG.

JARRING DEVICE FOR DUST COLLECTORS. APPLICATION FILED APR. 29. 1914,

C D M m a m H M W m n m 0 H P O, c 5 m T E P m R m N M T HENRY LECHTENBERG, OF QUINCY, ILLINOIS, ASSIGNOR T0 W. T. LEGHTENBERG.

JARRING DEVICE FOR DUST-COLLECTORS.

Specification of Letters Patent.

Patented Apr. 13, 1015..

Application filed April 29, 1914. Serial No. 835,120.

To all whom it may concern:

Be it known that I, HENRY LE'CHTENBERG, a citizen of the United States of America, and a resident of the city of Quincy, in the county of Adams and State of Illinois, have invented certain new and useful Improvements in Jarring Devices for Dust-Collectors, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to dust collectors, or more specifically stated, to a jarring device for dust collectors and it has for its object the production of a simple and very efficient device adapted to impart an intermittent shaking or jarring movement to the dust collecting screens.

Figure I is a transverse section of my jarring device showing it secured to a wall of a dust collector housing. Fig. II is a vertical section of the parts shown in Fig. I. Fig. HT is a horizontal section.

In the accompanying drawings: A designates the housing of a dust collector and B designates yieldable dust collecting screens arranged in said housing. Each of the dust collecting screens I have shown comprises frame members 1 and fabric sheets 2 secured to said frame members. The dust laden air in the housing is drawn toward the screen members 2 by any suitable mechanism such for example as a suction fan. The air passes through the screenmembers as indicated by the arrows while the dust collects on the outer face of said screen members.

3 designates a shaker bar connecting the screens B and adapted to be vibrated with the result of shaking the screens and loosening the dust therefrom. The end of the shaker bar constitutes an abutment which is struck by a hammer as will be hereinafter described.

My jarring device preferably comprises a casing C secured to the dust collector housing at a point opposite the shaker bar 3. At this point the dust collector housing is provided with an opening 4 through which the shaker bar passes, and to prevent the escape of dust the outer end of the casing C is provided with a closure 5.

D designates a hammer slidably mounted between guide lugs 6 in the housing C. A rotatable drive shaft 7 j ournaled in the easing C passes through a slot 8 in the hammer D.

9 designates cam fingers secured to the rotatable drive shaft 7, and adapted to engage a lug 10 on the hammer.

11 designates compression springs arranged in pockets in the hammer D, and 12 designates spring caps on the outer ends of said springs. The springs may be adjusted by screws 13 passing through the closure 5 and fitted to the spring caps 12. IA designates jam nuts for locking the screws 13.

The operation of my jarring device is as follows: The drive shaft 7 is rotated to impart a rotary motion to the cam fingers 9, and these fingers alternately engage the lug 10 on the hammer with the result of sliding the hammer away from the shaker bar 3. The springs 11 tend to force the hammer toward the shaker bar 3 and when a rotating cam finger is released from the lug 10 the hammer is very quickly thrown against the shaker bar by means of the springs 11. The cam fingers travel in a fixed path and move the hammer a fixed distance away from the shaker bar, however the force of the hammer blows may be varied by adjusting the springs 11 which return the hammer. It is important that the hammer blows be of sufficient force to effectually loosen the dust from the yielding screen structure, but if the blows are too severe the yielding structure may be greatly injured by the hammer. I therefore provide the adjusting screws 13 which may be readily adjusted to secure the desired jarring action.

I claim:

1. A jarring device comprising a casing having an opening at one end and a spring seat near its opposite end, the said casing being provided with guides for the reception of a hammer block, a hammer block arranged within said casing and slidably fitted to said guides, said hammer block being interposed between said spring seat and said opening, a spring interposed between an end of said hammer block and said spring seat, a rotatable drive shaft extending through said casing, and a cam on said drive shaft arranged alongside of said hammer block and located directly between said hammer block and a side wall of said casing, said hammer block being provided with a lug extending from one of its side faces toward the last mentioned side wall of said casing and located in the path of said cam.

2. A jarring device comprising a casing having an opening at one end for the reception of a shaker bar and provided with guides for the reception of a hammer block, a slotted hammer block arranged Within said casing and fitted t0 the opposing Walls thereof, said hammerblock being slidably fitted to said guides, a rotatable drive shaft extending into said casing and passing through the slot in saidhammerblook, a cam on said drive shaft arrangedalongside of said hammer block, the hammer block being provided With a lateral projection adapted to be engagedby said'cam, and a spring for sliding said hammer block toward said opening.

3. A jarring device comprising a casing having an opening for the reception of a shaker bar, a hammer block fitted to opposing Walls of said casing, said hammer'block being provided with a pair of'spring pockshaft located alongside said hammer block,

the said hammer block being provided with a lateral projection adapted to be engaged by said cam.

HENRY LEOHTENBERG.

In the presence of H. C. SrRioK, G. A. LECHTENBERG.

Copies of this'patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

